I am curious why volume interests you. Market technicians have debated the relationship between price and volume for decades. At the MTA Florida regional (starting today) I am sure it will again be the subject of roundtable discussions. Some (Mark Leibovit) has made a career out of volume relationships "Volume Reversal Indicator". Mark publishes a year-a-head forecast for most major markets every new year. Tries to forecast hi-lo points and time durations. Over the years he has been surprisingly accurate (within time margins).
Other than volume on inflection points bowoffs/selling climaxes; I feel the predicative use of volume is found in the relationship of volume and open interest.